Apparatus and method for a heating mat

Abstract

The invention relates to an apparatus for a heating mat (10) comprising two mats (11, 12) of thermoplastic between which mats a heat emitting device (15) is arranged. The device (15) is produced by knitting or crocheting. The invention also relates to methods and uses.

1 . Apparatus for a heating mat comprising two mats of thermoplastic between which mats at least one heat emitting device is arranged, wherein the device is produced by knitting or crocheting. 
     
     
         2 . Apparatus according to  claim 1 , wherein the device comprises a conductive wire or a strip with an electrically insulating surface layer. 
     
     
         3 . Apparatus according to  claim 1 , wherein the heating mat is arranged self-assembled. 
     
     
         4 . Apparatus according to  claim 1 , wherein the heat emitting device of the mat has connecting wires for connection to an electrical power source. 
     
     
         5 . Apparatus according to  claim 1 , wherein one of the thermoplastic mats has holes for evacuation of air/gas located inside the heating mat. 
     
     
         6 . Apparatus according to  claim 1 , wherein the device is kept warm by an arrangement arranged for temperature monitoring by measuring resistance of the device, and that an arrangement is arranged for varying current pulse activities at constant voltage depending on the heating requirement of the device. 
     
     
         7 . Apparatus according to  claim 1 , wherein meshes formed by knitting or crocheting have different sizes depending on the desired heating pattern within the heat emitting device. 
     
     
         8 . Method for manufacturing a heating mat comprising two mats of thermoplastic between which mats at least one heat emitting device is arranged, comprising, after parts of the heating mat have been combined exerting compression of the heating mat during removal of air/gas present inside the heating mat, and during temperature monitoring, heating the heating mat by means of the device and/or at least an external heat source until the heating mat becomes self-assembled. 
     
     
         9 - 11 . (canceled)